Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f2f66659e353fb…

MALICIOUS

PDF

73.4 KB Created: 2021-07-13 16:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1532122fea8389158f0673f08cc0fef8 SHA-1: e95cc4667f92056fa5c8ba527f20278846d481c0 SHA-256: a0f2f66659e353fb098c18b5a92bad7a7cfd71ecce4c5a8d2898877f0484645d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised websites, specifically WordPress installations, which are likely used to host further malicious content. The presence of these links suggests an attempt to redirect users to malicious sites, aligning with a phishing or exploit delivery attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8362

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a822e4f86957f178e6581a9a5ac8a84d/30377878534.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/361f583794643f84821f9364a13be208/jaxiremafupirisifupa.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/muvinijakoperizigovit.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160846b154423f---kulifubevajawarugupurosi.pdfIn PDF document text
    • http://lblussana.it/images/file/88260703574.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/dba6b0c850019c4200ffbc1db6feaa24/vutomoruvuwat.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/6828408921.pdfIn PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/95502014192.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/90891936975.pdfIn PDF document text
    • http://adbuffalony.com/uploads/files/21494369434.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/27659047053.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/60422768979.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bb99baf22---bevepogi.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc91814b0a---34093844846.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/damirugemenidavo.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/375807871.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e1ae0c69d---jojexukisas.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/57286297501.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/42906150103.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/reretefezubebixijimomiwez.pdfIn PDF document text
    • https://sanidom.pl/img/file/91723932986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=persona+5+calling+card+themePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 10952 bytes
SHA-256: 97e92439109fd2bf8a11ef34de83e411ae3982a141c3f2ee08868c2bc23db7f3

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